Roof based Rain Water Harvesting:Roof based rainwater shall be harvested through a storage tank or recharged through an open well or a bore well in the building irrespective of the nature of sub-soil conditions.

Land based Rain Water Harvesting:Land based rain water from the open spaces around the buildings/ gardens parks shall be harvested using appropriate ground water recharge structures depending on the nature of the sub-soil conditions.

Recharging ground water through open well

Recharging ground water through Bore well


While designing the capacity of the storage structure for the Roof top Rain Water Harvesting or for design of artificial recharge structures to ground water a provision of 20 ltrs or more per (2 Ltrs per sq.ft) of the roof area shall be adopted.